Explain withdrawal of cash warrants

INTEGRATED Finance Management System (IFMS) officers have been instructed to withdraw all unissued cash funds certificate and warrants for the interim supplementary budget.
They have bluntly informed line agencies last Friday that warrants would be reinstated selectively once the supplementary budget is released.
The IFMS is restricting commitment of goods and services.
According to Monday’s The National (page 2): ‘House to debate on Supplementary Budget’, Treasurer Ian Ling-Stuckey explained that the supplementary budget is to address the impact of the Covid-19 pandemic.
The Treasurer is ironically trying to be sarcastic on Covid-19.
I think he is trying to address the cash overdraft in the Central Bank.
Why freezing the IFMS when parliament hasn’t debated on the proposed supplementary budget?
It seems that the process of supplementary budget is being hijacked while parliament is yet to pass the bill for that.

Mcstalin, POM